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Free Particle Impact Machining Process

IP.com Disclosure Number: IPCOM000073889D
Original Publication Date: 1971-Feb-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Putnam, DT: AUTHOR

Abstract

Circumferentially spaced work pieces 18 are positioned radially outboard of a high-speed throwing wheel 10 which discharges by centrifugal force abrasive particles 26 through radially extending channels 24 to machine abrade the faces of work pieces 18. The chamber defined by cylindrical housing 12 is subject to vacuum by a vacuum pump which also maintains a slight vacuum within an oil sump, not shown, to cause oil flow from an oil supply to the bearings supporting wheel 10. In addition to the vacuum, a supply of helium or other light gas may be connected to conduit 104 opening into housing 12 and carrying valve 106 to allow the interior of housing 12 to be selectively filled with a light gas. This technique may be used without a vacuum system to provide a reduced density gas at atmospheric pressure.

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Free Particle Impact Machining Process

Circumferentially spaced work pieces 18 are positioned radially outboard of a high-speed throwing wheel 10 which discharges by centrifugal force abrasive particles 26 through radially extending channels 24 to machine abrade the faces of work pieces 18. The chamber defined by cylindrical housing 12 is subject to vacuum by a vacuum pump which also maintains a slight vacuum within an oil sump, not shown, to cause oil flow from an oil supply to the bearings supporting wheel 10. In addition to the vacuum, a supply of helium or other light gas may be connected to conduit 104 opening into housing 12 and carrying valve 106 to allow the interior of housing 12 to be selectively filled with a light gas. This technique may be used without a vacuum system to provide a reduced density gas at atmospheric pressure. The vacuum or low density atmosphere within the chamber ensures little aerodynamic loss due to windage effects on wheel 10, low drag on particles 26 as they move freely from channels 24 to pieces 18 and no cushioning due to entrapment of air between particles 26 and pieces 18. The vacuum within the oil sump ensures positive lubrication of the bearings supporting wheel 10 and prevents abrasive particles from entering the bearings.

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